Main Features:- Sleep monitor: it will record your sleep time and sleep quality so that you can change your habit to improve your sleep - Anti-lost: it can help you remind the watch - Sapphire mirror design is scratch resistant and water resistant - You can power off the smart wristband by long press the UI interface - Answer the phone just by one key - APP supports multiple languages, including English, French, German, Hebrew, Japanese, Portuguese, Russian, simplified Chinese, Spanish, traditional Chinese- M6 smart wristband just supports English and simplified Chinese